Rewinding machine



Feb. 23, 1954 -r 2,670,152

REWINDING MACHINE Filed March 3, 1950 5 Sheets-Sheet l Feb. 23, 1954 L. PRIEST 2,670,152

REWINDING MACHINE Filed March 3, 1950 5 Sheets-Sheet 2 1719932208 leafed Pdz'e'sfig @ZMZ? M by Feb. 23, 1954 L. PRIEST REWINDING MACHINE 5 Sheets-Sheet 3 Filed March 3, 1950 Feb. 23, 1954 PRlEsT REWINDING MACHINE 5 Sheets-Sheet 4 Filed March 3, 1950 E All W MNN IZZUGZZZOJ":

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0 00 gm A Patented Feb. 23, 1954 Lester iPries t, Brookfield, Mass iMcLaurin Jones =.Co., Brook v assignor to field, -Mass., a. cornotation of Massahusetts -iimilieation Mart-hi3, 1950, 'S'efiiail No. unset 6 Gla-ims.

This "invention relates ito improvements :in paper rewinding *m'achines, alnd more partiow laz ly to a paper 's'littin'g and :rew'inding *maehihe for convertmg a relatively wiueweb or paper or other sheet material into a :nuinb'er of relatively small and 'narrow rolls.

In accordance'with a usual practice in slitting and mew-hiding a relatively Wide web of paper into a number "of narrow rol'ls, th'e web -is first s'lit and then wo'und inisli't iorm onaznuiiiber of cores mounted on a mandrel, said mandrel being rotated to'wind the web on the cores byaxpeir oi 'driv'en b'e'd rollers iriotioneilly engaging the outer surface-of paper-being wound. When the desired amount -'of paper has 'been -wound on the cores, it is necessar-y to stop the machine, :sever the web of paper with a knife or the llike, remove the mandrel with the wound rolls, and transfer the slit web onto another set of-coreson another mandrel before restarting the madliine. Since offsuch a tool was awkward, non-uniform, "and q normally required two or three false starts =before thestrips were all securely 'tuked intot-he nip so that the rewindin'g operation 'cou'ld be resu'nie'd. "This transfer and hand tucking operatio'n was necessarily time consuming and, "durin'g'such time, 'the maohinewas idlethusgreaitltr decreasing "the i'p'ossiule 'produetion "of "the ma.- hine due to "the, large number of "transfer and tucking operations necessary. "Furthermore, the use of such a tool did -notgive uniform tuliin'g of allfthe cores lto be wound, .an'd"he'nce the wound rolls resulting from the rewin'ding operation were. not uniform.

Aigeneral object of Linventionis. to {provide novel apparatus. for automatically transferring and tucking the end of .amelatively wide slit web into the. nip between, underlying "rollers -and. Lthe mandrel-mounted cores on which theasmallirol-ls are to :bowound inefieeting a transfer iofithe. web from .iullywound rolls on one. mandrel .to the emptycores on another mandrel.

A further object of my inventions-s C110 iprouide automatic transfer and tuckingionparatus "which may h =added :to a itype' ofzrewinding-maehiriesin commercial use, without tthenecessityaof providiing a completely new machine in order to. secure the advantages :of my invention.

Aistill further to'hject'o'f my invention is to 1320- vide an automatic tucking apparatus which will produce uniformly wound rolls, -and which will decrease the amount'of timeatipresent required to :transierrthe slit iwebirom the fully wound'rolls to :a :new set of :eores, :thus increasing production For l'th'e ipurpose vof zmore :iully describing 0H8 preferred "emboziimentaofimy invention, reference is made to the following drawings, iin'which:

Fig. 1 its an :elevational aiew' of zone umdcof -the machine;

Fig. 2 is an elevational cross 'sectionail wiew showing the position of the :p'arts while aroil Iis being wound on thamachine;

Fig. 3 is an "elevational cross-sectional view show-inaposition of the parts'at the begimiing of the transfer and tucking operation;

Fig. 4 is "an iel'evational cross-sectional view showing the position of the parts at an intermediate portion of the transfer and tucking operation;

-Fig's. 4a and 4b are respectively side and end elevational' views of a part of the madliine i of -Fig. 1'; and

Fig. 5 is an levati'onal cross-sectional view sho'wingthe position (if the parts at the completion'of the transfei-and tucking=operation.

Referring to Fig. 1-the rewinding machine illustrated, in general, of a "conventional type and imiludesa frame 2 on which are mounted b'edjrollers t and 6 driven :by suitable means not shown. A roll "III of paper orother sheetimaterial is-mounted onbraekets '3' atth'e rear ofirame "2 of the machine, the web 12' of paper beingiled irom therdll All by. meanstof suitakilev guide rollers 11,. I5. and "I5 :past xslitter kni-vesv..|1, around .the forward; driven bed roller 16', andIbe'in-g wound up onirolliill, said .ro'll lineludingaimandre'l ;22, with, preferably, eores -24-as hereinafter .more iullyiexplained. An idler (roller 32 6 is providedsat the front :of the. machine adjacent -bed .roller 6' @to facilitate iremovalef ,fully wound: rolls leaf-mm the machine. 'IInorder toyprov-ide-the necessary frictional, engagement bet rollers-Landtgsuch rewind-mg machines anemonmally'iprovided with a head .roller -30 :rotatably mounteddn:end bearingsA-I-Z, said-endbearingsi-be ing mounted in vertical movementfon thevertiealendmembersiof :atop -frameM. To aidiin guiding said head roller bearin gsr32 zfor velitl'fifll. movement, top irame @34 :may :he :provideti iwlith-f vertical tracks 113 6: iand'll'awks 58 :--asrec-pant of" vertical .lend. members at opposite ends o? teen ,roll 52 Ilia-rid i'bed.

frame 34, head roller bearings 32 riding on said tracks 36, and pinions 48 mounted on said head roller bearings engaging said racks 38.

The vertical movement of bearings 32 is controlled by chains 42 and 44 attached to bearings 32 and to counterweights 48. Upper chains 44 lead around sprockets 46 rotatably mounted at the upper ends of the vertical members of top frame 34 to counterweights 48 mounted for vertical movement along guide bars 58 mounted at opposite ends of the rear of frame 2. Counterweights 48 are normally adjusted to permit head roller 39 to be automatically moved upward as the size of the rewound roll of paper it increases during winding, without causing undue pressure on said roll 20. Lower chains 42 lead around sprockets 52 rotatably mounted on frame 2 and upward to counterweights 48. Sprockets 52 may be rotated to move head roller 38 by means of chain 54 operatively attached to one of said sprockets 52 and hand wheel 56, so that the rotation of hand wheel 55 will rotate sprockets 52 and move head roller 32 vertically as desired.

Referring to Figs. 1 and 2the novel transfer and tucking mechanism of my invention includes two blade-like elements extending for the entire width of the web I2 of paper or other sheet material and movably sup-ported at opposite ends of the machine, one of said elements 66 acting as a tucking element to tuck the deflected web I2 into the nip between cores 24 on mandrel 22 and bed roller 6, said element 80 being urged downwardly by a pair of levers it adapted to be pivoted about pins I2 by contact with adjustable b'olts IS on stops I4, and the other of said elements to acting as a transfer element to deflect the end of the web I2 of paper partly around cores 24 on mandrel 2. Since this effects a complete surrounding of the cores 24 by the web l2 and an overlapping of the tucked portion, rota u tion of cores 24 by bed rollers 4 and 6 will wind and build up the web I2 to form a roll or series of rolls 20.

Transfer element 89 is adapted for movement toward and away from mandrel 22 surrounded by cores 24, in a plane substantially tangential to the upper surface of cores 24 to enable the end of web I2 overlying said transfer element to be deflected to a position partly around cores 24 on said mandrel where it may be engaged by tucking element 60. Rollers 82 mounted on transfer element 88 ride on tracks 84 mounted substantially horizontally on the end members of top frame 34, permitting free forward and rearward motion of said transfer element. Vertical cam plates 85 (Figs. 4a and 4b) are rigidly mounted on the ends of transfer element and are movable with said transfer element. The transfer element 8% and associated cam plates 88 are normally urged rearwardly by weights 88 attached to cam plates 86 by cables 90, said cables being led around pulleys 92 rotatably mounted at the end of horizontal tracks 84. Back-up springs 94 are provided at the rear edge of horizontal tracks 84 to resist the rearward movement of transfer element 82 and cam plates 86.

Forward and rearward motion of rear transfer element 80 is provided by the action of cam followers 9t cooperating with cam plates 86, said cam followers being mounted on and vertically movable with bearings 32 to move transfer element 8G to its forward position as hereinafter more fully explained.

Tucking element 62 is adapted to tuck the end of the deflected web into the nip between bed roll 6 andcores24 to initiate therewinding, but yet does not interfere with the rewinding operation as it is vertically movable with head roller 3!! and moves away from tucking engagement with web I2 as head roller 38 moves vertically, as hereinafter more fully explained.

The ends of tucking element 66 are slidably mounted in slots 62 in plates 54 mounted on bearings 32 and movable vertically with said bearings. The slots 62 and tucking element til are arranged at a suitable angle for tucking the web I2 into the nip between driven roller 6 and cores 24 on mandrel 22, said tucking element being substantially tangential to the surfaces of driven roller 6 and empty cores 24 on mandrel 22 at f; their point of contact. The tucking element 50 is normally retained at the upper end of slots 62 by coil springs 66 attached to said element 50 and to arms 68 extending upwards from and forming a part of plates 64. Levers it are pivotally mounted on pins 12 on plates 54 and bear against the upper edge of tucking element 60, while stops I4 adapted to co-operate with said levers are rigidly mounted on top frame 34, said levers I0 being pivoted by contact with stops I4 Y as a foundation for the lever to urge tucking element Bil downward against the force exerted by the springs 56. Machine bolts I5 are provided on levers ill to permit adjustment of the contact of levers It with stops I4.

Referring to Fig. 3, the position of the machine elements is shown at the beginning of an operating cycle, such as after a fully wound set of rolls of paper on a mandrel has been removed from the machine. In accordance with the usual practice, the head roller 32 has been raised vertically by means of hand wheel 56, and a mandrel 22 with empty cores 24 has been placed on top of the web 12 of paper between bed rollers 4 and 6 in readiness for the transfer and tucking operations preparatory to the winding operation. The bearings 32 carrying tucking elements 60 and cam followers 96 of my novel transfer and tucking mechanism have likewise been raised to bring cam followers 96 to a position above that of cam plates 86, and transfer element is in its normal position with the cut end of web I2 overlying said element.

Referring now to Fig. 4, as head roller 321s lowered by hand wheel 56, cam followers 96 engage the upper rear sloping edge H32 of cam plates 86, driving transfer element 80 forward under the web I2 of paper and transferring said web to a position partly around and over the top of cores 24 on mandrel 22, so that at the completion of the travel of cam followers 96 along the entire length of the upper rear sloping edges I02 of cam plates 36, transfer element 80 is in its forward position holding the web I2 tightly wrapped around and securely clamped on top of cores 24 on mandrel 2.

Referring now to Fig. 5, as the head roller 30 is lowered further to engage web I2 on cores 24 on mandrel 22, cam followers 96 engage the lower rear vertical edges I64 of cam plates 86, causing a dwell of transfer element 80 as head roller 30 is further lowered. At the same time, tucking element B0 is approaching operative tucking engagement with web I2, and when machine bolts 16 on levers 18 engage stops I4 on top frame 34, levers I0 are pivoted about pins I2 urging tucking element 60 downward in slots 62 against the force exerted by springs 66 and tucking the web I2 securely into the nip between driven roll 6 and cores 24 on mandrel 22. At the same time as the tucking element 66 tucks the web I2 securely around cores 24 and into the nip between cores emanate 5.; and :driven roller tiollomers it'ipass rout of engagement-aw itliildwrerrrear vertical ed es m4 erm. :platesfiiirzreleasing transfer element 80 which is then pulled rearwardly out of operative engagement with web B2 'lry." weightsetii, :cam followers 96 spassing beneath the lower horizontal edge I96, of cam plates 86. A ,slight further lowering'ofnnachine part 32 then permits headmller Ilto engagethe web +2 on "cores 24, suchweb still being; securely held "by upper tucking elemen fifl- -'The"windingoperation-maythen be s'jtartedby lfdtfitting bed; rollers i -and 6. 'Since they-web t2 overlying bed roller 6 overlaps the tucked end of web [2, the rotation of cores 24 by bed rollers 4 and 6 will wind and build up the web I 2 on cores 24. As the number of turns of the web I2 on cores 24 increases, forming a roll 20, head roller 30.and associated bearings 32 are automatically raised by the increase in diameter of roll 20, such action being Well known in rewinding machines of the type herein described. As bearings 32 are thus raised, levers 10 are pivoted about pins 12 as machine bolts 16 pass out of engagement with stops 14, releasing the pressure on tucking element 60 and permitting it to be pulled upward in slots 62 by springs 66, thus removing tucking element 60 from tucking engagement with Web I 2. The engagement and removal of tucking element 60 may be adjusted for different mandrels 22, cores 24 or the like by means of machine bolts 16, which adjustment will vary the point on the vertical travel of machine part 32 at which the levers 10 are pivoted by engagement with stops since such engagement initiates the downward movement of tucking element 66 in slots 62.

Thus the novel transfer and tucking elements of my invention do not interfere with the normal rewinding operation, since the transfer element 80 passes out of engagement with web l2 before the rewinding operation begins, and tucking element 60 engages web l2 only long enough to assure that the first few turns of web l2 are tight enough to produce uniform rolls 20, and then the tucking element passes out of engagement with the web l2 as the head roller 30 automatically travels upward under the influence of the increasing size of roll 20.

During the upward travel of head roller 30, cam followers 96 preferably engage the forward edges of cam plates 86 for at least the final portion of their travel over said cam plates, thus urging cam plates 86 and transfer element 89 rearward against back-up springs 94 so that when cam followers 96 pass above cam plates 86, said cam plates will be moved slightly forward by said back-up springs 94 in order to insure that cam followers 96 in their subsequent downward travel will positively engage the upper rear sloping edges I02 of said cam plates.

It is apparent from the above that the trans-' fer and tucking operation will be performed automatically as the head roller elevating mechanism is elevated to remove a fully wound roll from the rewinding machine and then lowered after inserting a mandrel with empty cores. It will also be seen that my novel transfer and tucking apparatus is of a type that may be added to well known rewinding machines with a minimum amount of alteration, and as so added will result in a material reduction of the time necessary for transferring the web from a fully wound roll to empty cores and produce a better product at a much larger production rate.

Various changes and modifications may be 14 through machine bolts 16, a

made without departing from (at time imentinncand all-10f .suchchanges areicnntem plated as may come within the scopeeoifsthe apepended claims.

'1. :In a winding, machine tier-windin :a weirdntorolls, a rotatable mandrel, roller jmeanseincluding a pair of rollers; for frictionally-rotating mandrel, a movably supported transfer element movable for engagement withsaid web to deflect said web .to ,a position partly around. said. mandrel, a movably supported tucking element operable to tuck said web into the nip between saidmandrel and one of said rollers, tucking means operable after said transfer element has deflected said web around said mandrel to move said tucking element into tucking engagement with said web, said tucking means including a pivotally mounted lever adapted to move said tucking element, stop means cooperating therewith to pivot said lever to move said tucking element. and camming means operable to move said transfer element to deflect said web and operable after said tucking element has engaged said web to move said transfer element out of engagement with said web.

2. In a winding machine for winding a web into rolls, a rotatable mandrel, roller means including a pair of rollers for frictionally rotating said mandrel, a movably supported transfereleinent movable for engagement with said web to deflect said web to a position partly around said mandrel, a movably supported tucking element movable into engagement with said web to tuck said web, camming means operable to move said transfer element to deflect said web and operable after said tucking element has engaged said web to move said transfer element out of engagement with said web, said camming means including a cam plate movable with said transfer element and a cam follower movable with said tucking element and tucking means operable after said transfer element has deflected said web around the mandrel to tuck said web into said nip between said mandrel and one of its rollers, said means including a pivotally mounted lever adapted to move said tucking element and stop means cooperating therewith to pivot said lever to move said element into tucking engagement with said web.

3. In a machine for winding a web into rolls, a rotatable mandrel, roller means including a pair of rollers for frictionally rotating said mandrel, a movably supported tucking element operable to tuck said web into the nip between said mandrel and one of said rollers, and tucking means including a pivotally mounted lever adapted to move said tucking element and stop means cooperating therewith to pivot said lever to move said tucking element into tucking engagement with said web.

4. In a winding machine for winding a Web into rolls, a rotatable mandrel, roller means including a pair of rollers for frictionally rotating said mandrel, a movably supported transfer element movable for engagement with said web to deflect said Web to a position partly around said mandrel, a movably supported tucking element movable into engagement with said web to tuck said web and tucking means operable after said transfer element has deflected said web around said mandrel to move said tucking element to tuck said web into the nip between said mandrel and one of said rollers, and camming means operable to move said transfer'element 7 after said tucking element has engaged said web to move said transfer element out of engagement with said web.

5. In a winding machine for winding a web into rolls as claimed in claim 4 in which said tucking means includes a pivotally mounted lever adapted to move said tucking element, and stop means cooperating therewith to pivot said lever to move said tucking element into tucking engagement with said web.

6. In a winding machine for winding 2. Web into rolls as claimed in claim 4 in which said camming means includes a cam plate movable 8 with said transfer element and a cam follower movable with said tucking element.

LESTER PRIEST.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 670,187 Simpson Mar. 19, 1901 2,200,000 Johnstone May 7, 1940 2,261,417 Schultz et a1. Nov. 4,1941 2,361,264 Christman Oct. 24, 1944 2,364,888 Aycock Dec. 12, 1944 2,449,945

Lewis Sept. 21, 1948 

